spread-date.js

/**
 * e.g. retrieving field values from a form.
 */
function getDateFromForm() {
  const props = ['year', 'month', 'day', 'hour', 'minutes', 'sec', 'milisec'];
  return props.map((prop) => {
    return document.querySelector(`#${prop}`).text;
  });
}

const dateFields = getDateFromForm();
const d = new Date(...dateFields); // et voilà

// ----------
// instead of
// ----------

var year = document.querySelector('#year').text;
var month = document.querySelector('#month').text;
var day = document.querySelector('#day').text;
var hour = document.querySelector('#hour').text;
var min = document.querySelector('#min').text;
var sec = document.querySelector('#sec').text;
var milisec = document.querySelector('#milisec').text;

var d = new Date(year, month, day, hour, min, sec, milisec);